<template>
  <div style="padding: 10px">
    <!--    功能区域-->
    <div style="margin: 10px 0">
      <el-button type="primary" @click="add" v-if="user.role === 1"
        >新增</el-button
      >
      <el-popconfirm
        v-if="user.role === 1"
        title="确定删除吗？"
        @confirm="deleteBatch"
      >
        <template #reference>
          <el-button type="danger">批量删除</el-button>
        </template>
      </el-popconfirm>
    </div>

    <!--    搜索区域-->
    <div style="margin: 10px 0">
      <el-input
        v-model="search"
        placeholder="请输入关键字"
        style="width: 20%"
        clearable
      ></el-input>
      <el-button type="primary" style="margin-left: 5px" @click="load"
        >查询</el-button
      >
    </div>
    <el-table
      v-loading="loading"
      :data="tableData"
      border
      stripe
      style="width: 100%"
      @selection-change="handleSelectionChange"
    >
      <el-table-column type="selection" width="55"> </el-table-column>
      <el-table-column prop="id" label="ID" sortable> </el-table-column>
      <el-table-column prop="name" label="名称"> </el-table-column>
      <el-table-column prop="price" label="单价"> </el-table-column>
      <el-table-column prop="author" label="作者"> </el-table-column>
      <el-table-column prop="createTime" label="出版时间"> </el-table-column>
      <el-table-column label="封面">
        <template #default="scope">
          <el-image
            style="width: 100px; height: 100px"
            :src="scope.row.cover"
            :preview-src-list="[scope.row.cover]"
          >
          </el-image>
        </template>
      </el-table-column>
      <el-table-column label="操作" width="240">
        <template #default="scope">
          <el-button type="primary" size="mini" @click="buy(scope.row.id)"
            >购买</el-button
          >
          <el-button
            size="mini"
            @click="handleEdit(scope.row)"
            v-if="user.role === 1"
            >编辑</el-button
          >
          <el-popconfirm
            title="确定删除吗？"
            @confirm="handleDelete(scope.row.id)"
            v-if="user.role === 1"
          >
            <template #reference>
              <el-button size="mini" type="danger">删除</el-button>
            </template>
          </el-popconfirm>
        </template>
      </el-table-column>
    </el-table>

    <div style="margin: 10px 0">
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="currentPage"
        :page-sizes="[5, 10, 20]"
        :page-size="pageSize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>

      <el-dialog title="提示" v-model="dialogVisible" width="30%">
        <el-form :model="form" label-width="120px">
          <el-form-item label="名称">
            <el-input v-model="form.name" style="width: 80%"></el-input>
          </el-form-item>
          <el-form-item label="价格">
            <el-input v-model="form.price" style="width: 80%"></el-input>
          </el-form-item>
          <el-form-item label="作者">
            <el-input v-model="form.author" style="width: 80%"></el-input>
          </el-form-item>
          <el-form-item label="出版时间">
            <el-date-picker
              v-model="form.createTime"
              value-format="YYYY-MM-DD"
              type="date"
              style="width: 80%"
              clearable
            ></el-date-picker>
          </el-form-item>
          <el-form-item label="封面">
            <el-upload
              ref="upload"
              :action="filesUploadUrl"
              :on-success="filesUploadSuccess"
            >
              <el-button type="primary">点击上传</el-button>
            </el-upload>
          </el-form-item>
        </el-form>
        <template #footer>
          <span class="dialog-footer">
            <el-button @click="dialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="save">确 定</el-button>
          </span>
        </template>
      </el-dialog>
    </div>
  </div>
</template>

<script>
import request from "@/utils/request";

export default {
  name: "Book",
  components: {},
  data() {
    return {
      user: {},
      loading: true,
      form: {},
      dialogVisible: false,
      search: "",
      currentPage: 1,
      pageSize: 10,
      total: 0,
      tableData: [],
      filesUploadUrl:
        "http://" + window.server.filesUploadUrl + ":9090/files/upload",
      ids: [],
    };
  },
  created() {
    let userStr = sessionStorage.getItem("user") || "{}";
    this.user = JSON.parse(userStr);
    // 请求服务端，确认当前登录用户的 合法信息
    request.get("/user/" + this.user.id).then((res) => {
      if (res.code === "0") {
        this.user = res.data;
      }
    });

    this.load();
  },
  methods: {
    buy(bookId) {
      request.get("/order/buy/" + bookId).then((res) => {
        // 请求成功跳转沙箱支付的页面
        window.open(res.data);
      });
    },
    deleteBatch() {
      if (!this.ids.length) {
        this.$message.warning("请选择数据！");
        return;
      }
      request.post("/book/deleteBatch", this.ids).then((res) => {
        if (res.code === "0") {
          this.$message.success("批量删除成功");
          this.load();
        } else {
          this.$message.error(res.msg);
        }
      });
    },
    handleSelectionChange(val) {
      this.ids = val.map((v) => v.id); // [{id,name}, {id,name}] => [id,id]
    },
    filesUploadSuccess(res) {
      console.log(res);
      this.form.cover = res.data;
    },
    load() {
      this.loading = true;
      request
        .get("/book", {
          params: {
            pageNum: this.currentPage,
            pageSize: this.pageSize,
            search: this.search,
          },
        })
        .then((res) => {
          this.loading = false;
          this.tableData = res.data.records;
          this.total = res.data.total;
        });
    },
    add() {
      this.dialogVisible = true;
      this.form = {};
      if (this.$refs["upload"]) {
        this.$refs["upload"].clearFiles(); // 清除历史文件列表
      }
    },
    save() {
      if (this.form.id) {
        // 更新
        request.put("/book", this.form).then((res) => {
          console.log(res);
          if (res.code === "0") {
            this.$message({
              type: "success",
              message: "更新成功",
            });
          } else {
            this.$message({
              type: "error",
              message: res.msg,
            });
          }
          this.load(); // 刷新表格的数据
          this.dialogVisible = false; // 关闭弹窗
        });
      } else {
        // 新增
        request.post("/book", this.form).then((res) => {
          console.log(res);
          if (res.code === "0") {
            this.$message({
              type: "success",
              message: "新增成功",
            });
          } else {
            this.$message({
              type: "error",
              message: res.msg,
            });
          }

          this.load(); // 刷新表格的数据
          this.dialogVisible = false; // 关闭弹窗
        });
      }
    },
    handleEdit(row) {
      this.form = JSON.parse(JSON.stringify(row));
      this.dialogVisible = true;
      this.$nextTick(() => {
        if (this.$refs["upload"]) {
          this.$refs["upload"].clearFiles(); // 清除历史文件列表
        }
      });
    },
    handleDelete(id) {
      console.log(id);
      request.delete("/book/" + id).then((res) => {
        if (res.code === "0") {
          this.$message({
            type: "success",
            message: "删除成功",
          });
        } else {
          this.$message({
            type: "error",
            message: res.msg,
          });
        }
        this.load(); // 删除之后重新加载表格的数据
      });
    },
    handleSizeChange(pageSize) {
      // 改变当前每页的个数触发
      this.pageSize = pageSize;
      this.load();
    },
    handleCurrentChange(pageNum) {
      // 改变当前页码触发
      this.currentPage = pageNum;
      this.load();
    },
  },
};
</script>
